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Clipping 기반의 무선 인터넷 사이트 구축용 변환 서버 구현
조승호,차정훈 한국정보처리학회 2004 정보처리학회논문지. 컴퓨터 및 통신시스템 Vol.11 No.2
Because a quantity of wireless internet contents is much less than wired internet contents, it exist high necessities that wired internet contents should be converted into wireless internet contents. The conversion server implemented in this paper, automatically recognizes the type of user agents when they request, retrieves source documents on the web site specified by an URL, generates metaXML documents as an intermediate form, and converts them wireless markup documents appropriate for user agents. The conversion server interoperates with the image converter for image conversion and the clipper which is an authoring tool for clipping existing wired internet documents. We performed experiments about capability of the conversion server transcoding static/dynamic web pages specified by an URL. According to performance results on dynamic web pages, the conversion server showed better throughput when a thread pool in the server maintains 5 threads compared with 1 and 10 threads. 현재 유선 인터넷 컨텐츠와 비교할 때 무선 인터넷 컨텐츠가 크게 부족하여 유선 컨텐츠들을 무선 인터넷 컨텐츠로 변환시키고자 하는 요구가 높다. 본 연구의 변환 서버는 사용자 단말기로부터 요청을 자동적으로 인식하여 대상 URL 서버상의 원본 문서를 검색하여 이들을 중간 언어인 metaXML 문서로 생성하고 이를 사용자 단말기에 적합한 무선 마크업 언어 문서로 변환 출판한다. 또한, 본 변환 서버는 이미지 변환을 위하여 이미지 변환기와 기존 웹 페이지들의 재구성 저작 도구인 Clipper와 연동하여 동작한다. 대상 URL의 정적/동적 웹 페이지를 처리하는 변환 서버의 처리 능력에 대하여 성능 실험을 수행하였으며, 동적 문서에 대한 변환 실험 결과에 따르면, 변환 서버내 스레드 풀의 스레드 개수를 5개로 유지할 때 변환 서버가 가장 나은 처리량을 나타내었다.
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조승호,정종완 대한공업교육학회 2006 대한공업교육학회지 Vol.31 No.1
개발 수업 모형 설계 : 수업 과정과 전략 수업지도안 개발 프로그램 구성3. 개선단계 프로그램 평가2. 교육 프로그램의 목적 The purpose of this study was to reform the existing state of educational program for invention by TRIZ, theory of inventive problem solving. Major findings of the study were follows : First, students had a chance to get a inventive solution from the problem they were inventing. Second, the new educational program for invention was developed according to the procedures on the standpoint of pedagogy with the TRIZ. Third, according to the survey of the new educational program for invention has found that as follows: -Students were of help to know the invention, to be beneficial, but the basic concepts of TRIZ were not easy to them. -Student wished to advice their colleague the new program for invention, because they had chances to overcome a fixed idea, extend creativity and think. Fourth, TRIZ, the systematic method of problem solving for invention, provide students with the thinking method to overcome fixed ideas and the tool of knowledge.
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일부(一部) 생명보험(生命保險) 가입자(加入者)의 혈청총(血淸總)콜레스테롤치(値)에 관(關)한 연구(硏究)
조승호,Jo, Seung-Ho 한국생명보험의학회 1984 保險醫學會誌 Vol.1 No.1
The serum total cholesterol levels were measured by Rosenthal modified method for the insured persons who had passed the medical examination in a life insurance company, Seoul. The sera were obtained from 1,878 adults, 626 males and 1,252 fermales, from sep 1980 to Dec. 1981. The results obtained in the measurement were as follows; 1. The mean and standard deviation of serum cholesterol level in the healthy insured persons were $163{\pm}$ in male, and $157{\pm}24mg%$ in female. The difference of the values between male and female showed statistical signifi- (p<0.01). With regard to sex and age differences, female were significantly higher than male in the 10's, and male were higher than female in the 20's and 50's between both sexes. 2. The cholesteol of male was gradully increased about 12mg% according to the increase of every 10-year interval, but no increase was observed from the 40's to the 50's. The cholesterol level of female was higher in the 10's than in the 20's, and was increased gradually from the 20's to the 50's. 3. No significant difference in serum total cholesterol levels between the insured persons and other normal Korean groups was observed; the frequency distribution of the cholestrol level for the population showed normal distribution.
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趙勝鎬,黃雲圭 弘益大學校 科學技術硏究所 2003 科學技術硏究論文集 Vol.14 No.-
A neural network controller in parallel with a PD controller is suggested for robust motion control of a nonlinear hydraulic servo system. A self-excited oscillation method is applied for the servovalve-controlled cylinder system to identify the design parameters of a open loop transfer function. Based on them, a PD feedback compensator is designed first and then a neural network is incorporated. The Neural network is trained off-line by simulation in order to be effectively utilized in the real-time experiment. The PD-NN control experiment for tracking a reference model has been performed and proved its excellent performances by comparing with those of a PD feedback compensator.
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속도제어-정용량 펌프를 사용하는 실린더-부하계의 에너지절약-부하감지형 경로제어
조승호 사단법인 유공압건설기계학회 2009 드라이브·컨트롤 Vol.6 No.3
This paper deals with the issue of robust position tracking control and energy-saving control for a valve-controlled cylinder system using speed-controlled fixed displacement pump. The whole feedback control system is composed of a pair of interconnected subsystems, that is, valve-controlled cylinder system and load-sensing control system. From experiments it is shown that position tracking control in the load sensing control system can accomplish significant reduction in input energy to pump comparing to a conventional valve-controlled cylinder system, while exhibiting the same position tracking control accuracy.
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유압 서어보 시스템의 위치제어를 위한 축소차수 관측기의 실현화 연구
趙勝鎬,金勳鍾 弘益大學校 1987 弘大論叢 Vol.19 No.2
The reduced third-order observer was constructed using the linearized fourth-order hydraulic servosystem and it was exploited to estimate the state vaviables which can not be measured directly. Use was made of the estimated state variables including the measuned piston displacement in feedback control of the nonlinear hydraulic servosystem. Computer simulation showed that the nonlinear hydraulic servosystem was sensitive to the observer gain. Moreover the increase in coulomb friction and mass load resulted in the more sluggish response.
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趙勝鎬 弘益大學校 科學技術硏究所 1994 科學技術硏究論文集 Vol.5 No.-
Inherent nonlinearities and uncertainties in powertrains prohibits linear control methods from prevailing. In the automatic transmission using planetary gear there exists nonlinearities due to the finite difference between gear ratios, which yield torque hole during shift and influence on the ride quality and life of clutch. Based on the reaction carrier and converter turbine speed sliding functions are defined. Nonlinear closed-loop control laws are derived using them. Computer simulation shows that the closed loop design is more effective than the open loop design.
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